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Disminución de la pérdida de masa en la Antártida debido a las retroalimentaciones de la Tierra sólida y el nivel del
E Larour1,2, H Seroussi3, S Adhikari3
1Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA, USA. eric.larour@jpl.nasa.gov.
Science (New York, N.Y.)
|April 27, 2019
Resumen
La elevación de la Tierra sólida estabiliza las capas de hielo polares. Las nuevas simulaciones muestran que este efecto reduce el glaciar Thwaites
Área de la Ciencia:
- Física de la Tierra sólida
- Glaciología
- Ciencia del clima en la Antártida
Sus antecedentes:
- Los estudios geodésicos revelan que la elevación de la Tierra sólida estabiliza las capas de hielo polares.
- El impacto de la elevación de longitud de onda corta cerca de las líneas de conexión a tierra sigue sin evaluarse.
Objetivo del estudio:
- Para simular la evolución de la capa de hielo de la Antártida teniendo en cuenta los procesos de la Tierra sólida.
- Evaluar la influencia de la elevación a corto plazo de la Tierra sólida en la migración de la línea de conexión a tierra.
Principales métodos:
- Desarrolló una simulación global de alta resolución de la evolución de la capa de hielo de la Antártida.
- Incorpora todos los procesos relevantes de la Tierra sólida que afectan a las capas de hielo.
Principales resultados:
- Se proyectó una retroalimentación negativa del 38% en la migración de la línea de conexión a tierra para el glaciar Thwaites.
- Esta retroalimentación corresponde a una reducción del 26,8% en la contribución del nivel del mar.
Conclusiones:
- La elevación de la Tierra sólida de longitud de onda corta tiene un impacto significativo en la estabilidad de la línea de conexión a tierra.
- Este mecanismo ofrece una retroalimentación estabilizadora crucial para las capas de hielo de la Antártida.
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